Add themes, static assets, and logo

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Co-Authored-By: Claude <noreply@anthropic.com>

themes/vanilla-js/card-template.html

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+<!-- Card Template - Jinja2 template -->
+<template id="post-card-template">
+  <article class="post-card" data-post-id="{{id}}" data-platform="{{platform}}">
+    <header class="post-header">
+      <div class="post-meta">
+        <span class="platform-badge platform-{{platform}}">{{platform}}</span>
+        {% if source %}<span class="post-source">{{source}}</span>{% endif %}
+      </div>
+      <h2 class="post-title">
+        <a href="{{post_url}}" target="_blank" rel="noopener">{{title}}</a>
+      </h2>
+    </header>
+
+    <div class="post-info">
+      <span class="post-author">by {{author}}</span>
+      <time class="post-time" datetime="{{timestamp}}">{{formatTime(timestamp)}}</time>
+    </div>
+
+    <div class="post-content">
+      {% if content %}<p class="post-excerpt">{{ renderMarkdown(content)|safe }}</p>{% endif %}
+    </div>
+
+    <footer class="post-footer">
+      <div class="post-stats">
+        <span class="stat-score" title="Score">
+          <i class="icon-score">▲</i> {{score}}
+        </span>
+        <span class="stat-replies" title="Replies">
+          <i class="icon-replies">💬</i> {{replies}}
+        </span>
+      </div>
+
+      {% if tags %}
+        <div class="post-tags">
+          {% for tag in tags if tag %}
+            <span class="tag">{{tag}}</span>
+          {% endfor %}
+        </div>
+      {% endif %}
+    </footer>
+  </article>
+</template>